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(2) If any discrepancy is found: Do the (l) Material Incorporated by Reference prompted by a report of the failure of actions specified in paragraphs (g)(2)(i) and (1) The Director of the Federal Register the right MLG to extend due to fatigue (g)(2)(ii) of this AD. approved the incorporation by reference cracking of the end cap fitting. We are (i) Repair the discrepancy before further (IBR) of the service information listed in this issuing this AD to prevent such flight using a method approved in paragraph under 5 U.S.C. 552(a) and 1 CFR cracking, which could result in accordance with the procedures specified in part 51. paragraph (j) of this AD. depletion of the combined (left) and (2) You must use this service information utility hydraulic system fluid and the (ii) On areas that are not repaired, repeat as applicable to do the actions required by the inspections thereafter at the applicable this AD, unless the AD specifies otherwise. nitrogen emergency blowdown system, times specified in paragraph 1.E., (i) Boeing Alert Service Bulletin 737– failure of the combined (left) hydraulic ‘‘Compliance,’’ of Boeing Alert Service 53A1248, Revision 2, dated October 14, 2015. system (all phases) to provide adequate Bulletin 737–53A1248, Revision 2, dated (ii) Reserved. hydraulic pressure, and failure of the October 14, 2015. (3) For service information identified in MLG to extend when commanded. (h) Terminating Action for AD 2005–21–06 this AD, contact Boeing Commercial DATES: This AD is effective September Airplanes, Attention: Data & Services 23, 2016. Accomplishment of the initial inspections Management, P.O. Box 3707, MC 2H–65, required by paragraph (g) of this AD Seattle, WA 98124–2207; telephone 206– The Director of the Federal Register terminates the requirements of AD 2005–21– 544–5000, extension 1; fax 206–766–5680; approved the incorporation by reference 06. Internet https://www.myboeingfleet.com. of certain publications listed in this AD (i) Credit for Previous Actions (4) You may view this service information as of September 23, 2016. at the FAA, Transport Airplane Directorate, We must receive comments on this This paragraph provides credit for the 1601 Lind Avenue SW., Renton, WA. For AD by October 24, 2016. actions specified in paragraph (g) of this AD, information on the availability of this if those actions were performed before the ADDRESSES: You may send comments, material at the FAA, call 425–227–1221. using the procedures found in 14 CFR effective date of this AD using Boeing Alert (5) You may view this service information Service Bulletin 737–53A1248, dated that is incorporated by reference at the 11.43 and 11.45, by any of the following September 9, 2004; or Boeing Alert Service National Archives and Records methods: Bulletin 737–53A1248, Revision 1, dated Administration (NARA). For information on • Federal eRulemaking Portal: Go to September 10, 2007; which are not the availability of this material at NARA, call http://www.regulations.gov. Follow the incorporated by reference in this AD. 202–741–6030, or go to: http:// instructions for submitting comments. (j) Alternative Methods of Compliance www.archives.gov/federal-register/cfr/ibr- • Fax: 202–493–2251. (AMOCs) locations.html. • Mail: U.S. Department of (1) The Manager, Seattle Aircraft Issued in Renton, Washington, on August Transportation, Docket Operations, Certification Office (ACO), FAA, has the 30, 2016. M–30, West Building Ground Floor, authority to approve AMOCs for this AD, if Michael Kaszycki, Room W12–140, 1200 New Jersey requested using the procedures found in 14 Acting Manager, Transport Airplane Avenue SE., Washington, DC 20590. CFR 39.19. In accordance with 14 CFR 39.19, Directorate, Aircraft Certification Service. • Hand Delivery: Deliver to Mail send your request to your principal inspector [FR Doc. 2016–21410 Filed 9–7–16; 8:45 am] address above between 9 a.m. and 5 or local Flight Standards District Office, as p.m., Monday through Friday, except appropriate. If sending information directly BILLING CODE 4910–13–P to the manager of the ACO, send it to the Federal holidays. attention of the person identified in For service information identified in paragraph (k)(1) of this AD. Information may DEPARTMENT OF TRANSPORTATION this final rule, contact Gulfstream be emailed to: 9-ANM-Seattle-ACO-AMOC- Aerospace Corporation, Technical [email protected]. Federal Aviation Administration Publications Dept., P.O. Box 2206, (2) Before using any approved AMOC, Savannah, GA 31402–2206; telephone notify your appropriate principal inspector, 14 CFR Part 39 800–810–4853; fax 912–965–3520; email or lacking a principal inspector, the manager [email protected]; Internet http:// of the local flight standards district office/ [Docket No. FAA–2016–9070; Directorate _ Identifier 2016–NM–118–AD; Amendment www.gulfstream.com/product support/ certificate holding district office. _ (3) An AMOC that provides an acceptable 39–18642; AD 2016–18–11] technical pubs/pubs/index.htm. You may view this referenced service level of safety may be used for any repair, RIN 2120–AA64 modification, or alteration required by this information at the FAA, Transport AD if it is approved by the Boeing Airworthiness Directives; Gulfstream Airplane Directorate, 1601 Lind Avenue Commercial Airplanes Organization Aerospace Corporation Airplanes SW., Renton, WA. For information on Designation Authorization (ODA) that has the availability of this material at the been authorized by the Manager, Seattle AGENCY: Federal Aviation FAA, call 425–227–1221. It is also ACO, to make those findings. To be Administration (FAA), DOT. available on the Internet at http:// approved, the repair method, modification www.regulations.gov by searching for deviation, or alteration deviation must meet ACTION: Final rule; request for the certification basis of the airplane, and the comments. and locating Docket No. FAA–2016– approval must specifically refer to this AD. 9070. SUMMARY: We are adopting a new (k) Related Information airworthiness directive (AD) for all Examining the AD Docket (1) For more information about this AD, Corporation You may examine the AD docket on contact Alan Pohl, Aerospace Engineer, Model G–1159, G–1159A, G–1159B, the Internet at http:// Airframe Branch, ANM–120S, FAA, Seattle G–IV, and GV airplanes; and certain www.regulations.gov by searching for Aircraft Certification Office (ACO), 1601 Lind Model GIV–X and GV–SP airplanes. and locating Docket No. FAA–2016– Avenue SW., Renton, WA 98057–3356; This AD requires a one-time 9070; or in person at the Docket phone: 425–917–6450; fax: 425–917–6590; email: [email protected]. replacement of the actuator end cap Management Facility between 9 a.m. (2) Service information identified in this fitting of the main landing gear (MLG) and 5 p.m., Monday through Friday, AD that is not incorporated by reference is door, and revision of the maintenance or except Federal holidays. The AD docket available at the addresses specified in inspection program to establish the life contains this AD, the regulatory paragraphs (l)(3) and (l)(4) of this AD. limit of the end cap fitting. This AD was evaluation, any comments received, and

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other information. The street address for • Gulfstream G450 Maintenance AD. The FAA has found that the risk to the Docket Office (phone: 800–647– Manual TR 32–1, dated April 22, 2016. the flying public justifies waiving notice 5527) is in the ADDRESSES section. • Gulfstream G450 Maintenance and comment prior to adoption of this Comments will be available in the AD Manual TR 5–2, dated April 22, 2016. rule because fatigue cracking of the • docket shortly after receipt. Gulfstream G500 Maintenance MLG door actuator end cap fitting could Manual TR 32–1, dated May 20, 2016. FOR FURTHER INFORMATION CONTACT: result in depletion of the combined (left) • Gulfstream G500 Maintenance Gideon Jose, Aerospace Engineer, and utility hydraulic system fluid and Manual TR 5–3, dated May 20, 2016. Systems and Equipment Branch, ACE– • Maintenance the nitrogen emergency blowdown 119A, FAA, Atlanta Aircraft Manual TR 32–1, dated May 20, 2016. system, failure of the combined (left) Certification Office (ACO), 1701 • Gulfstream G550 Maintenance hydraulic system (all phrases) to Columbia Avenue, College Park, GA Manual TR 5–3, dated May 20, 2016. provide adequate hydraulic pressure, 30337; phone: 404–474–5569; fax: 404– • Gulfstream II Maintenance Manual and failure of the MLG to extend when 474–5606; email: [email protected]. TR 32–1, dated April 15, 2016. commanded. Therefore, we find that SUPPLEMENTARY INFORMATION: • Gulfstream II Maintenance Manual notice and opportunity for prior public TR 5–3, dated April 15, 2016. comment are impracticable and that Discussion • Gulfstream IIB Maintenance Manual good cause exists for making this We have received a report of an TR 32–3, dated April 15, 2016. amendment effective in less than 30 • Gulfstream IIB Maintenance Manual incident involving a Model G–1159A days. TR 5–3, dated April 15, 2016. (G–III) airplane. During approach, the • right MLG failed to extend during Gulfstream III Maintenance Manual Comments Invited normal or alternative extension TR 32–1, dated April 15, 2016. • Gulfstream III Maintenance Manual This AD is a final rule that involves procedures. We have determined that TR 5–2, dated April 15, 2016. requirements affecting flight safety and the MLG door actuator end cap fitting is • Gulfstream IV Maintenance Manual subject to fatigue cracking, allowing for was not preceded by notice and an TR 32–2, dated April 29, 2016. opportunity for public comment. the depletion of the combined (left) and • Gulfstream IV Maintenance Manual utility hydraulic system fluid and the However, we invite you to send any TR 5–7, dated April 29, 2016. written data, views, or arguments about nitrogen emergency blowdown system. • Maintenance Manual this AD. Send your comments to an This condition, if not corrected, could TR 32–2, dated May 20, 2016. result in failure of the combined (left) • Gulfstream V Maintenance Manual address listed under the ADDRESSES hydraulic system (all phrases) to TR 5–3, dated May 20, 2016. section. Include the docket number provide adequate hydraulic pressure This service information is reasonably FAA–2016–9070 and Directorate and failure of the MLG to extend when available because the interested parties Identifier 2016–NM–118–AD at the commanded. We are issuing this AD to have access to it through their normal beginning of your comments. We correct the unsafe condition on these course of business or by the means specifically invite comments on the products. identified in the ADDRESSES section. overall regulatory, economic, environmental, and energy aspects of Related Service Information Under FAA’s Determination 1 CFR Part 51 this AD. We will consider all comments We are issuing this AD because we received by the closing date and may We reviewed the following temporary evaluated all the relevant information amend this AD because of those revisions (TRs), which provide and determined the unsafe condition comments. procedures for replacing MLG door described previously is likely to exist or actuator end cap fittings, and establish develop in other products of the same We will post all comments we life limits for the end cap fittings. type design. receive, without change, to http:// • www.regulations.gov, including any Gulfstream G300 Maintenance AD Requirements Manual, TR 32–2, dated April 29, 2016. personal information you provide. We This AD requires repetitively • Gulfstream G300 Maintenance will also post a report summarizing each replacing the MLG door actuator end Manual, TR 5–3, dated April 29, 2016. substantive verbal contact we receive • cap fittings and revising the about this AD. Gulfstream G350 Maintenance maintenance or inspection program, as Manual TR 32–1, dated April 22, 2016. Costs of Compliance • applicable, to establish life limits for Gulfstream G350 Maintenance MLG door actuator end cap fittings. Manual TR 5–2, dated April 22, 2016. We estimate that this AD affects 1,409 • Gulfstream G400 Maintenance FAA’s Justification and Determination airplanes of U.S. registry. We estimate Manual TR 32–2, dated April 29, 2016. of the Effective Date the following costs to comply with this • Gulfstream G400 Maintenance An unsafe condition exists that AD: Manual TR 5–3, dated April 29, 2016. requires the immediate adoption of this

ESTIMATED COSTS

Cost per Cost on U.S. Action Labor cost Parts cost product operators ($) ($) ($)

Replacement ...... 37 work-hours × $85 per hour = $3,145 ...... $698 $3,843 $5,414,787 Maintenance/inspection program revision ...... 1 work-hour × $85 per hour = $85 ...... 0 85 119,765

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Authority for This Rulemaking § 39.13 [Amended] (6) Gulfstream G450 Maintenance Manual ■ 2. The FAA amends § 39.13 by adding TR 32–1, dated April 22, 2016. Title 49 of the Code (7) Gulfstream G500 Maintenance Manual specifies the FAA’s authority to issue the following new airworthiness TR 32–1, dated May 20, 2016. rules on aviation safety. Subtitle I, directive (AD): (8) Gulfstream G550 Maintenance Manual section 106, describes the authority of 2016–18–11 Gulfstream Aerospace TR 32–1, dated May 20, 2016. the FAA Administrator. ‘‘Subtitle VII: Corporation: Amendment 39–18642; (9) Gulfstream V Maintenance Manual TR Aviation Programs’’ describes in more Docket No. FAA–2016–9070; Directorate 32–2, dated May 20, 2016. Identifier 2016–NM–118–AD. (10) Gulfstream II Maintenance Manual TR detail the scope of the Agency’s 32–1, dated April 15, 2016. authority. (a) Effective Date (11) Gulfstream III Maintenance Manual TR We are issuing this rulemaking under This AD is effective September 23, 2016. 32–1, dated April 15, 2016. the authority described in Subtitle VII, (b) Affected ADs (h) Revision of Maintenance/Inspection Part A, Subpart III, Section 44701: Program ‘‘General requirements.’’ Under that None. Within 90 days after the effective date of section, Congress charges the FAA with (c) Applicability this AD, revise the maintenance or inspection promoting safe flight of civil aircraft in This AD applies to the Gulfstream program, as applicable, to incorporate the air commerce by prescribing regulations Aerospace Corporation airplanes, certificated information for the part number for practices, methods, and procedures in any category, identified in paragraphs 1159HM20178 MLG actuator end cap fitting the Administrator finds necessary for (c)(1) through (c)(7) of this AD. in the applicable TR identified in paragraphs safety in air commerce. This regulation (1) All Model G–1159 airplanes. (h)(1) through (h)(11) of this AD. The initial is within the scope of that authority (2) All Model G–1159A airplanes. compliance time to replace the MLG actuator because it addresses an unsafe condition (3) All Model G–1159B airplanes. end cap fitting, as specified in the TR, is (4) All Model G–IV airplanes. before the accumulation of 9,500 total that is likely to exist or develop on (5) All Model GV airplanes. landings on the end cap fitting, or within 90 products identified in this rulemaking (6) Model GIV–X airplanes, serial numbers days after the effective date of this AD, action. 4001 through 4350 inclusive. whichever occurs later. Regulatory Findings (7) Model GV–SP airplanes, serial numbers (1) Gulfstream IIB Maintenance Manual TR 5001 through 5542 inclusive. 5–3, dated April 15, 2016. (2) Gulfstream IV Maintenance Manual TR This AD will not have federalism (d) Subject implications under Executive Order 5–7, dated April 29, 2016. 13132. This AD will not have a Air Transport Association (ATA) of (3) Gulfstream G300 Maintenance Manual America Code 32, Landing gear. TR 5–3, dated April 29, 2016. substantial direct effect on the States, on (4) Gulfstream G400 Maintenance Manual (e) Unsafe Condition the relationship between the national TR 5–3, dated April 29, 2016. government and the States, or on the This AD was prompted by a report that the (5) Gulfstream G350 Maintenance Manual distribution of power and right main landing gear (MLG) failed to TR 5–2, dated April 22, 2016. responsibilities among the various extend due to fatigue cracking of the end cap (6) Gulfstream G450 Maintenance Manual levels of government. fitting. We are issuing this AD to prevent TR 5–2, dated April 22, 2016. such cracking, which could result in (7) Gulfstream G500 Maintenance Manual For the reasons discussed above, I depletion of the combined (left) and utility certify that this AD: TR 5–3, dated May 20, 2016. hydraulic system fluid and the nitrogen (8) Gulfstream G550 Maintenance Manual (1) Is not a ‘‘significant regulatory emergency blowdown system, failure of the TR 5–3, dated May 20, 2016. action’’ under Executive Order 12866, combined (left) hydraulic system (all (9) Gulfstream V Maintenance Manual TR (2) Is not a ‘‘significant rule’’ under phrases) to provide adequate hydraulic 5–3, dated May 20, 2016. DOT Regulatory Policies and Procedures pressure, and failure of the MLG to extend (10) Gulfstream II Maintenance Manual TR when commanded. (44 FR 11034, February 26, 1979), 5–3, dated April 15, 2016. (f) Compliance (11) Gulfstream III Maintenance Manual TR (3) Will not affect intrastate aviation 5–2, dated April 15, 2016. in Alaska, and Comply with this AD within the (4) Will not have a significant compliance times specified, unless already (i) No Alternative Actions and Intervals economic impact, positive or negative, done. After the maintenance or inspection on a substantial number of small entities (g) MLG Actuator End Cap Fitting program has been revised as required by under the criteria of the Regulatory Replacement paragraph (h) of this AD, no alternative actions (e.g., inspections) or intervals may be Flexibility Act. Before the accumulation of 9,500 total used unless the actions or intervals are landings on the MLG actuator end cap fitting, List of Subjects in 14 CFR Part 39 approved as an alternative method of or within 90 days after the effective date of compliance (AMOC) in accordance with the Air transportation, Aircraft, Aviation this AD, whichever occurs later: Replace the procedures specified in paragraph (k) of this safety, Incorporation by reference, end cap fitting, in accordance with the AD. applicable temporary revision (TR) identified Safety. in paragraphs (g)(1) through (g)(11) of this (j) Special Flight Permit Adoption of the Amendment AD. For airplanes on which the number of A special flight permit may be issued in total accumulated landings since new cannot accordance with sections 21.197 and 21.199 Accordingly, under the authority be determined, do the replacement within 90 of the Federal Aviation Regulations (14 CFR delegated to me by the Administrator, days after the effective date of this AD. 21.197 and 21.199) to operate the airplane, the FAA amends 14 CFR part 39 as (1) Gulfstream IIB Maintenance Manual TR for one flight only, to a location where the follows: 32–3, dated April 15, 2016. MLG actuator end cap fitting can be replaced, (2) Gulfstream IV Maintenance Manual TR as required by paragraph (g) of this AD. PART 39—AIRWORTHINESS 32–2, dated April 29, 2016. (k) Alternative Methods of Compliance DIRECTIVES (3) Gulfstream G300 Maintenance Manual TR 32–2, dated April 29, 2016. (AMOCs) ■ 1. The authority citation for part 39 (4) Gulfstream G400 Maintenance Manual (1) The Manager, Atlanta Aircraft TR 32–2, dated April 29, 2016. Certification Office (ACO), FAA, has the continues to read as follows: (5) Gulfstream G350 Maintenance Manual authority to approve AMOCs for this AD, if Authority: 49 U.S.C. 106(g), 40113, 44701. TR 32–1, dated April 22, 2016. requested using the procedures found in 14

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CFR 39.19. In accordance with 14 CFR 39.19, (3) For Gulfstream service information of a certain publication listed in this AD send your request to your principal inspector identified in this AD, contact Gulfstream as of October 13, 2016. or local Flight Standards District Office, as Aerospace Corporation, Technical ADDRESSES: For service information appropriate. If sending information directly Publications Dept., P.O. Box 2206, Savannah, to the manager of the ACO, send it to the GA 31402–2206; telephone 800–810–4853; identified in this final rule, contact attention of the person identified in fax 912–965–3520; email pubs@ Airbus SAS, Airworthiness Office— paragraph (l) of this AD. gulfstream.com; Internet http:// EAW, 1 Rond Point Maurice Bellonte, (2) Before using any approved AMOC, www.gulfstream.com/product_support/ 31707 Blagnac Cedex, France; telephone notify your appropriate principal inspector, technical_pubs/pubs/index.htm. +33 5 61 93 36 96; fax +33 5 61 93 44 or lacking a principal inspector, the manager (4) You may view this service information 51; email account.airworth-eas@ of the local flight standards district office/ at the FAA, Transport Airplane Directorate, airbus.com; Internet http:// certificate holding district office. 1601 Lind Avenue SW., Renton, WA. For information on the availability of this www.airbus.com. You may view this (l) Related Information material at the FAA, call 425–227–1221. referenced service information at the For more information about this AD, (5) You may view this service information FAA, Transport Airplane Directorate, contact Gideon Jose, Aerospace Engineer, that is incorporated by reference at the 1601 Lind Avenue SW., Renton, WA. Systems and Equipment Branch, ACE–119A, National Archives and Records For information on the availability of FAA, Atlanta Aircraft Certification Office Administration (NARA). For information on this material at the FAA, call 425–227– (ACO), 1701 Columbia Avenue, College Park, the availability of this material at NARA, call 1221. It is also available on the Internet 202–741–6030, or go to: http:// Georgia 30337; phone: 404–474–5569; fax: at http://www.regulations.gov by 404–474–5606; email: [email protected]. www.archives.gov/federal-register/cfr/ibr- locations.html. searching for and locating Docket No. (m) Material Incorporated by Reference FAA–2016–6671. Issued in Renton, Washington, on August (1) The Director of the Federal Register 24, 2016. Examining the AD Docket approved the incorporation by reference John P. Piccola, Jr., (IBR) of the service information listed in this You may examine the AD docket on paragraph under 5 U.S.C. 552(a) and 1 CFR Acting Manager, Transport Airplane the Internet at http:// part 51. Directorate, Aircraft Certification Service. www.regulations.gov by searching for (2) You must use this service information [FR Doc. 2016–21155 Filed 9–7–16; 8:45 am] and locating Docket No. FAA–2016– as applicable to do the actions required by BILLING CODE 4910–13–P 6671; or in person at the Docket this AD, unless the AD specifies otherwise. Management Facility between 9 a.m. (i) Gulfstream G300 Maintenance Manual and 5 p.m., Monday through Friday, Temporary Revision (TR) 32–2, dated April DEPARTMENT OF TRANSPORTATION 29, 2016. except Federal holidays. The AD docket (ii) Gulfstream G300 Maintenance Manual Federal Aviation Administration contains this AD, the regulatory TR 5–3, dated April 29, 2016. evaluation, any comments received, and (iii) Gulfstream G350 Maintenance Manual 14 CFR Part 39 other information. The street address for TR 32–1, dated April 22, 2016. the Docket Office (telephone 800–647– (iv) Gulfstream G350 Maintenance Manual [Docket No. FAA–2016–6671; Directorate 5527) is Docket Management Facility, TR 5–2, dated April 22, 2016. Identifier 2015–NM–164–AD; Amendment U.S. Department of Transportation, (v) Gulfstream G400 Maintenance Manual 39–18643; AD 2016–18–12] Docket Operations, M–30, West TR 32–2, dated April 29, 2016. RIN 2120–AA64 Building Ground Floor, Room W12–140, (vi) Gulfstream G400 Maintenance Manual 1200 New Jersey Avenue SE., TR 5–3, dated April 29, 2016. Airworthiness Directives; Airbus (vii) Gulfstream G450 Maintenance Manual Washington, DC 20590. TR 32–1, dated April 22, 2016. Airplanes FOR FURTHER INFORMATION CONTACT: Dan (viii) Gulfstream G450 Maintenance AGENCY: Federal Aviation Rodina, Aerospace Engineer, Manual TR 5–2, dated April 22, 2016. Administration (FAA), Department of International Branch, ANM 116, (ix) Gulfstream G500 Maintenance Manual Transportation (DOT). Transport Airplane Directorate, FAA, TR 32–1, dated May 20, 2016. 1601 Lind Avenue SW., Renton, WA (x) Gulfstream G500 Maintenance Manual ACTION: Final rule. TR 5–3, dated May 20, 2016. 98057–3356; telephone 425–227–2125; (xi) Gulfstream G550 Maintenance Manual SUMMARY: We are adopting a new fax 425–227–1149. TR 32–1, dated May 20, 2016. airworthiness directive (AD) for certain SUPPLEMENTARY INFORMATION: (xii) Gulfstream G550 Maintenance Manual Airbus Model A300 B4–203 and A300 TR 5–3, dated May 20, 2016. B4–2C airplanes. This AD was Discussion (xiii) Gulfstream II Maintenance Manual prompted by cracks found on pylon side We issued a notice of proposed TR 32–1, dated April 15, 2016. panels (upper section) at rib 8. This AD rulemaking (NPRM) to amend 14 CFR (xiv) Gulfstream II Maintenance Manual TR requires a detailed inspection for crack part 39 by adding an AD that would 5–3, dated April 15, 2016. indications of the pylon side panels; a apply to certain Airbus Model A300 B4– (xv) Gulfstream IIB Maintenance Manual high frequency eddy current (HFEC) TR 32–3, dated April 15, 2016. 203 and A300 B4–2C airplanes. The (xvi) Gulfstream IIB Maintenance Manual inspection to confirm any crack NPRM published in the Federal TR 5–3, dated April 15, 2016. indications; and repair of any cracking, Register on May 23, 2016 (81 FR 32256) (xvii) Gulfstream III Maintenance Manual or modification of the pylon side panels, (‘‘the NPRM’’). The NPRM was TR 32–1, dated April 15, 2016. and repetitive inspections and repair if prompted by cracks found on pylon side (xviii) Gulfstream III Maintenance Manual necessary. We are issuing this AD to panels (upper section) at rib 8. The TR 5–2, dated April 15, 2016. detect and correct cracking of the pylon NPRM proposed to require a detailed (xix) Gulfstream IV Maintenance Manual side panels. Such cracking could result inspection for crack indications of the TR 32–2, dated April 29, 2016. in pylon structural failure and in-flight pylon side panels; an HFEC inspection (xx) Gulfstream IV Maintenance Manual loss of an engine. TR 5–7, dated April 29, 2016. to confirm any crack indications; and (xxi) Gulfstream V Maintenance Manual DATES: This AD is effective October 13, repair of any cracking, or modification TR 32–2, dated May 20, 2016. 2016. of the pylon side panels, and repetitive (xxii) Gulfstream V Maintenance Manual The Director of the Federal Register inspections and repair if necessary. We TR 5–3, dated May 20, 2016. approved the incorporation by reference are issuing this AD to detect and correct

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